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HSS DIN335C Pramet is a European standard precision 3-flute countersink manufactured under German DIN335C specification, developed for industrial screw head sinking, hole chamfering and metal deburring. Made of premium M2 high-speed steel with full CBN deep grinding treatment, this 90° conical countersink features three unequal convex cutting edges and straight cylindrical shank, effectively eliminating cutting vibration and burr residues. Compatible with drill presses, CNC milling centers, bench drills and automatic lathes, it performs consistently on carbon steel, stainless steel, cast iron, aluminum alloy and brass, widely adopted in automotive, mold, hydraulic and general hardware mass production.
Key Features
DIN335C standard Form C heavy-duty structure, designed for deep countersinking of cross recessed bolts, hex socket screw heads
Premium HSS high-speed steel substrate, balanced hardness and toughness, anti-edge chipping under medium feed continuous cutting
3 unequal optimized flutes, large chip space for smooth swarf evacuation, no chip clogging during long batch processing
Full CBN precision grinding on all cutting surfaces, sharp cutting edge, chatter-free machining without vibration ripples on workpiece surface
Standard 90° cone angle perfectly matches metric screw head taper; optional 60°/120° angles for special chamfer requirements
h9 tolerance straight cylindrical shank, fits all standard ER collets, drill chucks and automatic tool holders without adapter modification
Radial back-off clearance design reduces cutting friction, lowers feed resistance and extends overall tool service life
Technical Specifications
Full Model: HSS DIN335C
Brand: Pramet (Dormer Pramet Europe Cutting Tool Brand)
Executive Standard: DIN 335:2024 Form C
Raw Material: M2 High Speed Steel (HSS-Co cobalt HSS optional)
For over 20 years, Trek Brand has been dedicated to the business of cutting tools. Our main focus is on wholesale distribution of renowned brands such as Walter, Hoffman, Mitsubishi, Taegutec, Tungaloy, OSG, and most importantly, China. We offer a comprehensive one-stop shopping experience for CNC c... For over 20 years, Trek Brand has been dedicated to the business of cutting tools. Our main focus is on wholesale distribution of renowned brands such as Walter, Hoffman, Mitsubishi, Taegutec, Tungaloy, OSG, and most importantly, China. We offer a comprehensive one-stop shopping experience for CNC c...